Turbo BASIC XL Reference Sheet

DISK & DOS COMMANDS:

BLOAD "Dn:FILENAME"

BRUN "Dn:FILENAME"

DELETE "Dn:FILENAME"

DIR {"Dn:FILESPEC")

LOCK "Dn:FILENAME"

RENAME "Dn:OLDFILE,NEWFILE"

UNLOCK "Dn:FILENAME"

MEMORY MANIPULATION:

DPEEK (MEMORY LOCATION)

DPOKE MEMORYLOC,VALUE
MOVE FROM_MEMLOC,TO_MEMLOC,NUMBYTES
-MOVE FROM_MEMLOC,TO_MEMLOC,NUMBYTES
NOTE: LAST BYTE MOVED FIRST!

BGET #CHAN,TO LOC,NUMBYTES
BPUT #CHAN,TO LOC,NUMBYTES
GET #CHAN,FLOATPT VALUE
PUT #CHAN,FLOATPT VALUE
STRUCTURED PROGRAMMING:

REPEAT. . (PROGRAM).. UNTIL
WHILE . (PROGRAM).. WEND

IF . (PROGRAM) :

ELSE .... (PROGRAM).. ENDIF
DO . (PROGRAM).. LOOP

EXIT EXIT FROM STRUCTURED LOOP

PROC PROCEDURE NAME ENDPROC

EXEC PROC_NAME (EXECUTE A PROCEDURE)

PROGRAMMING UTILITIES:

PAUSE N60 JIFFIES

RENUM STRTLINE,STRTNUM,INCREMENT
DEL FIRSTLINE,LASTLINE
DUMP (OPTIONAL DEVICE)

TRACE TURN TRACE ON
TRACE- TURN TRACE OFF

CHANGES TO ATARI BASIC:

CLOSE CLOSES CHANNELS 1-7

DIM ZERO'S ARRAYS; NULL's STRINGS

GET VNAME GETS VALUE FROM "K:"

INPUT "PROMPT";VNAME NOTE: NEW PROMPT
INPUT,VNAME NOTE: OLD "?" PROMPT
LIST STARTLINE, (ENDLINE) NOTE: LISTS
FROM STARTING LINE TO END OF PROGRAM
ON VALUE EXEC PROCI,PROC2,PROC NOTE:
COMPUTED "GOTO" A PROCEDURE NAME
PUT CHARNUM SAME AS ? CHR$(n)

RESTORE #LABELNAME

RND NOTE: (0) IS NOW OPTIONAL

SOUND NOTE TURNS OFF ALL SOUND

TRAP #LABELNAME NOTE: MAY TRAP TO A LABEL

TURBO BASIC FUNCTIONS:

HEX$ (VALUE)

DEC (HEXSTRING$) NOTE: MUST BE IN A STRING.
ARITHMETIC & LOGIC:

DIV DI DIV D2—>INTEGER QUOTIENT
MOD DI MOD D2—>REMAINDER OF DI/D2
FRAC(Vl) FRACTIONAL PART OF VI
TRUNC(Vl) TRUNCATES VI

RAND (VI) RANDOM INTEGER 0 TO VI
$VALUE ALLOWS HEX ENTRY ($0-FFFF)

& BITWISE "AND"

I BITWISE "OR"

EXOR BITWISE "EXCLUSIVE OR"

STRINGS & THINGS :

TIME N60 JIFFIES (NOTE: UNPATCHED VERSIONS
N50. MULTIPLY BY 5/6 TO CORRECT.)

TIME$ TIME "HH:MM:SS"

INKEY$ THE LAST KEY PRESSED

INSTR(STRING$,SUBSTRING$,START)

DSOUND n,f,d,v PAIRSREGISTERSFORRANGE
DSOUND TURNS OFF SOUND.

*L TURNS ON LINE INDENT
*L- TURNS OFF LINE INDENT
*F TURBO BASIC "FOR-NEXT"

*F- ATARI BASIC "FOR-NEXT"

*B TRAPS BREAK KEY
*B- UNTRAPS BREAK KEY
— SPECIAL REM (30 DASHES)

LABELNAME NOTE: LABEL PROC OR GOTO
GO# LABELNAME (GOTO A LABELNAME)

GRAPHICS:

CIRCLE X,Y,R(,R2) R2 IS VERTICAL R
FCOLOR COLOR# (FILL COLOR)

FILLTO X,Y (SAME AS XIO #6)

PAINT X,Y (FILLS AN ENCLOSED SHAPE)
TEXT X,Y,A$ (BIT-BLOCKS TEXT SHAPE)

NOTE: "START" IS OPTIONAL
UINSTR(STRING$,SUBSTRING$,START)

NOTE: NOT CASE SENSITIVE
ERR LAST ERROR NUMBER

ERL LAST ERROR LINE NOTE: TB DOES NOT

AUTOMATICALLY CLEAR EITHER ERR OR ERL!

%NUMBER DEFINES A CONSTANT

GENERAL NOTES:

-""TEXT"" (DOUBLE QUOTES ARE LEGAL)

-TB LOOKS FOR "AUTORUN.BAS " AT BOOT-UP
UNDERSCORE IS PERMITTED IN NAMES
-THE PATCHED (U.S.) VERSION OF TB HAS

PROMPT OF "TURBO" INSTEAD OF "READY"

-NEW ERROR MESSAGES: MANY ERROR

MESSAGES ARE NOW GIVEN IN TEXT AS
WELL AS ERROR NUMBERS. NEW ERROR
NUMBERS ARE #23 - 30 MOST OF WHICH ARE
RELATED TO LOOPS, NESTING, and
PROCedures